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"Ahead of this wildfire season it is always important to remember that Quebec is the only jurisdiction in North America that doesn't spray its forests with glyphosate for 'forest management,'" reads an from last month with around 11,000 likes. 

The post includes a screenshot of a "2025 wildfire map" that appears to mark wildfires across Canada and the United States with a flame icon. It bears the watermark of the Fire Information for Resource Management System US/Canada, a maintained by NASA, and the date Aug. 20, 2025. 

The majority of fires on the map are clustered in Western and Central Canada, while Quebec seems to have the fewest fires. 

The post suggests Quebec saw fewer fires than the rest of Canada because it does not use glyphosate on its forests. 

Some of those who the post elsewhere on social media glyphosate could be accelerating forest fires elsewhere in Canada. 

A to the one shared last month was posted by the same user in August 2025 and reshared on multiple social media platforms. 

THE FACTS

Glyphosate is a herbicide that is for agricultural management in Canada. 

Provinces including British Columbia, Ontario and New Brunswick use glyphosate-based weed killers in forests to that compete with conifers, the trees preferred by the forest industry. 

Quebec in its public forests in 2001. 

While there are legitimate health risks associated with glyphosate, maintains its use does not cause harmful effects for Canadians if the products containing it are used according to label instructions. 

Nelson Thiffault, a research scientist with the Canadian Forest Service, said wildfire occurrence and severity depends on a complex mix of factors.

They include weather conditions, drought, temperature, wind, ignition sources and topography, he said in email to ¹ú²úÓÕ»ó¸£Àû. 

"I’m not aware of any scientific evidence supporting the claim that Quebec has fewer wildfires because it banned the use of glyphosate in public forests in 2001, nor that glyphosate use is a primary driver of wildfire activity," Thiffault said.

Climate and weather would typically have the biggest impact on annual wildfire activity, he added.

Robert Gray, a fire ecologist and consultant, said glyphosate can make forest landscapes more flammable. 

"It's converting live vegetation to dead vegetation and that changes the dynamics of fire behaviour," he said in an interview. 

Thiffault said forest management practices that prioritize conifers create forests that are generally more flammable than those with more deciduous species, whose higher moisture content reduces fire intensity.

"However, these outcomes are shaped by overall management objectives and silvicultural systems, not by any single treatment tool in isolation," he said. 

Jonathan Boucher, also a research scientist with the Canadian Forest Service, said there isn't enough data to show glyphosate has a direct impact on wildfires, especially as other provinces use multiple methods to reduce the abundance of deciduous species. 

He added the map shared on social media is a snapshot in time that doesn't reveal much about wildfire behaviour in Canada. 

"There's a high variability from year to year, but also from regions to regions," he said of Canada's wildfire landscape in an interview. 

The researchers who spoke to ¹ú²úÓÕ»ó¸£Àû noted that Quebec experienced an unprecedented wildfire season in 2023, disproving social media conjecture about Quebec having fewer fires than other provinces as a result of its ban on glyphosate. 

Boucher said data from the 1970s onward shows Quebec leads the provinces when it comes to hectares burned annually.

He noted Quebec saw more than four million hectares burned in 2023, with the Northwest Territories a close second, despite neither the province or territory using glyphosate on forests. 

This report by ¹ú²úÓÕ»ó¸£Àû was first published July 2, 2026.